Data or Computer networking is the engineering discipline concerned with the communication between computer systems or devices.

A game developer is a software developer that creates video games specializing in specific video game consoles, such as Sony's PlayStation 3, PSP, Microsoft's Xbox 360, Nintendo's Wii, Nintendo DS, or developing for a variety of systems.

System programming is the activity of programming system software - producing software which provides services to the computer hardware (e.g. disk defragmenter)